Chemists use the concept of the mole to calculate the amounts of chemicals involved in a reaction. Define mole

Case study based questions:Read the following paragraph and answer the following questions:All chemical reactions involve interaction of atoms and molecules. A large number of atoms/molecules are present in a few grams of any chemical compound varying with their atomic/molecular masses. To handle such large numbers conveniently, the mole concept was introduced. All electrochemical cell reactions are also based on the mole concept. For example, a 4.0 molar aqueous solution of NaCl is prepared and 500 mL of this solution is electrolysed. This leads to the evolution of chlorine gas at one of the electrodes. The amount of products formed can be calculated by using the mole [email protected] Switch account Draft saved* Indicates required questionEmail*Record [email protected] as the email to be included with my response(i) The total number of moles of chlorine gas evolved is*1 point(a) 0.5(b) 1.0(c) 1.5(d) 1.9(ii) If cathode is a Hg electrode, then the maximum weight of amalgam formed from this solution is*1 point(a) 300g(b) 446 g(c) 396 g(d) 256 g(iii) In the electrolytes, the number of moles of electrons involved are*1 point(a) 2(b) 1(c) 3(d) 4(iv) In electrolysis of aqueous NaCl solution when Pt electrode is taken, then which gas is liberated at cathode?*1 point(a) H2 gas(b) Cl2 gas(c) O2 gas(d) None of these(v) The total charge (coulomb) required for complete electrolysis is*1 point(a) 186000(b) 24125(c) 48296(d) 19300

Expresses the relative number (amount) of moles

Number of moles

State all the mole formulas

The mass in grams of one mole of a substance is called the